Factory installed pressure regulator
Within the past two weeks I have noticed my water pressure drop about 30% after a few seconds of turning on a faucet. I found the culprit to be the factory installed pressure regulator behind the outside water faucet in the service bay. I knocked out the piece that regulates the water with a punch and put the unit back together. These regulators get plugged up or go bad from time to time and I will use the regulator I carry with me to attach to the water supply at it's source. I just can't see having to remove the panel, etc every so often to change it out.